JPH02154065A - Textile fabric-softening agent in form of yellow acid liquid turned blue when diluted - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION TECHNICAL FIELD This invention relates to compositions and methods for softening fabrics during the rinse cycle of home laundry operations. This is a bractis that is widely used to impart a smooth, soft, soft and fluffy (i.e. soft) texture or hand to washed fabrics.

Liquid fabric softening compositions have been known in the art for some time and are widely utilized by consumers during the rinse cycle of automatic laundry operations. As used herein and as known in the art, the term "fabric softening" refers to the process of imparting a desirably soft hand and fluffy appearance to fabrics.

BACKGROUND OF THE INVENTION Compositions containing cationic nitrogen-containing compounds in the form of quaternary ammonium salts and substituted imidazolinium salts having two long-chain acyclic aliphatic hydrocarbon groups can be used in laundry rinse operations. Commonly used to provide fabric softening benefits [e.g., U.S. Patent Section 3,644,203]
and No. 4,426,299; also [Cationic surfactants as fabric softeners J R,R,
Egan, Journal of the American Oil Chemistry Society (-(Journal or th
e^1erlcan Oll Cheg+l5ts'
5ociety), January 1978, pp. 118-121; and [How to Select Cationic Surfactants for Fabric Softeners JJ, A Ackerman, Journal of
The American Oil and Chemistry Australia Society, 1
See June 1983, pp. 1166-1169].

Quaternary ammonium salts with only one long-chain acyclic aliphatic hydrocarbon group (e.g., monostearyltrimethylammonium chloride) are compounds with two alkyl long chains, if they have the same chain length. are found to give better softening performance than those with one alkyl long chain and are therefore less commonly used (e.g., "Cationic Fabric Softeners" W, p. Evans, Industry End. Chemistry, July 1969, pp. 893-903). Also, US Pat. No. 4,464,272 teaches that monoalkyl quaternary ammonium compounds are less effective softeners.

Another type of nitrogen-containing material that is sometimes used in fabric softening compositions are non-quaternary amido-amines. The substances commonly mentioned are reaction products of higher fatty acids and hydroxyalkyl alkylene diamines. An example of these substances is the reaction product of higher fatty acids and hydroxyethylethylenediamine [Condensates of β-hydroxyethylethylenediamine with fatty acids or their alkyl esters and their application as fabric softeners in detergents] J H, W, Eckert, Fctte-8elfe Lo-Ans
trlehmlttcl), September 1972, No. 52
See pages 7 to 533]. These materials are commonly described along with other cationic quaternary ammonium salts and imidazolinium salts as softening active ingredients in fabric softening compositions (U.S. Pat. No. 4,460,485). Specification, No. 4,421.792, No. 4,327
, No. 133). U.S. Patent Section 3,775,31
Specification No. 6 discloses (a) a condensate of a hydroxyalkylalkyl polyamine and a fatty acid, and (b) (i) a quaternary ammonium salt having two long-chain alkyl groups from 0% to 10%.
0% and formula (11) [R5R6R7R8N) A (wherein, R5 is a long-chain alkyl group, R6 is an arylalkyl group and C3~
selected from the group consisting of C18 alkenyl and alkagenyl containing one or two C-C double bonds, R7 and R8 are C1-C7 alkyl groups, and A is an anion). A softening finish composition for washed laundry containing a mixture of quaternary ammonium compounds with 10,096% to 0% quaternary ammonium compounds is disclosed. U.S. Patent No. 3,904,533
Fabric softening compound and 1 to 3 short chains C1o-C14
Low temperature stabilizers that are quaternary ammonium salts containing alkyl groups (fabric softening compounds are quaternary ammonium salts containing two or more long chain alkyl groups, reaction products of fatty acids with hydroxyalkyl alkylene diamines, and other cationic materials.

SUMMARY OF THE INVENTION The present invention relates to acidic fabric softening compositions in liquid form for use in home laundry operations. The present invention is based on the discovery that a small amount of colorant in the paint imparts a desirable yellow color to the fabric softening composition dye and then turns blue when added to the rinse water.

According to the present invention, a color system consisting of about 3 to about 35 weight percent of a fabric softener and a yellow/blue colorant selected from the group consisting of nitrazine yellow, bromothymol blue, and mixtures thereof, from about 1 ppm to about 1. Fabric softening compositions are provided in the form of acidic aqueous dispersions containing 000 ppm, preferably from about 5 ppm to about 200 ppm. p of the composition
H is typically about 6 or less, more typically about 2 to about 5
, preferably about 265 to about 4.

DETAILED DESCRIPTION OF THE INVENTION The amount of fabric softener in the compositions of the present invention is typically from about 3 to about 35%, preferably from about 4 to about 27%, by weight of the composition. The lower limit is the amount required to contribute to effective fabric softening performance when added to laundry rinse baths in the manner customary in home laundering baths. The upper limit is preferred for concentrated products, giving consumers more economical use due to reduced packaging and distribution costs.

Some preferred compositions are disclosed in U.S. Patent No. 4,661.26.
It is disclosed in the specification of No. 9.

An aqueous acidic fabric softening composition having a composition pH of about 6 or less comprises: (from about 3% to about 35%, preferably from about 4% to about 35%, by weight of the total composition)
A yellow color consisting of about 27% by weight fabric softener and a ff1E1 yellow colorant selected from the group consisting of nitrazine yellow, bromothymol blue, and mixtures thereof. 000 ppm, preferably from about 5 ppm to about 200 ppm (These colorants provide the desired yellow color in the composition, but form a blue plume upon dilution in the rinse water. The composition when diluted with about 100 parts or more of water per part, preferably about 250 parts or more of water, has a pH of about 7.
．． H over 5.

One suitable fabric softener comprises (a) from about 10% to about 92% of the reaction product of a higher fatty acid and a polyamine selected from the group consisting of hydroxyalkylalkylene diamines and dialkylene triamines and mixtures thereof; (b) ) about 8% to about 90% of a cationic nitrogen-containing salt containing only one long chain acyclic aliphatic C1,-C2° hydrocarbon group; and optionally (C) two or more long chain acyclics. A mixture containing from 0% to about 80% of a cationic nitrogen-containing salt having the formula aliphatic 015-C2° hydrocarbon group or having one of the above groups and one arylalkyl group, the above (a), ( b) and (C)
% is the weight % of component I]; and (II) the remainder of the composition consists of a liquid carrier selected from the group consisting of water and mixtures of water and C1-C4-hydric alcohols, preferably monohydric alcohols. The composition has a pH of about 2 to about 5, more preferably about 2.5 to about 4).

Component I, as used herein, consists of a mixture of fabric softening active ingredients.

A general description of essential and optional ingredients of the present compositions, including specific examples, is provided below. Examples are given for illustrative purposes only and are not intended to limit the scope of the claims, unless otherwise noted.

Colorants useful in forming the desired yellow color that changes to blue upon colorant dilution include nitrazine yellow bromothymol blue, and mixtures thereof (e.g., about 100:1 to about 1:100, preferably about 10=1 to about 1:
10, more preferably in a ratio of about 4:1 to about 1:4). The structures of these colorants can be found in Aldrich's Catalog Handbook of Fine Chemicals.
ofFine Chemicals) (1984-198
5) Can be found in J. The chemical name of bromothymol blue is 3'3'-dibromothymol sulfonephthalein. The pH range of the colorant is approximately 6.0-7.
．． It is 6.

Most yellow to blue colorants are anionic and will interfere with the cationic fabric softeners preferred in this invention. therefore,
What will happen in fabric softener compositions is difficult, if not impossible, to predict from performance data of these colorants in solution.

The amount of colorant in the product typically ranges from about 1 ppm to about 1
,000ppm, preferably about 5ppm to about 200ppm
m, most preferably from about 10 ppm to about 1100 ppm.

The above colorants meet all of the requirements of these products.

They impart a desirable yellow color to such compositions, which are aesthetically compatible with, for example, the consumably desirable scents of lemon, sunlight, and/or outdoors, which connote freshness and cleanliness. However, blue is traditionally associated with whiteness/whitening and yellow with dark or dirty fabrics.

Colorants of the present invention that provide a yellow color in highly acidic compositions and turn blue upon dilution are hereinafter referred to as "yellow/blue" colorants.

Most yellow/blue colorants are unsuitable for one or more reasons.

It is understood that equivalent colorants that chemically correspond to the above colorants are also encompassed when referring to a particular yellow/blue precolorant.

The yellow/blue colorant of the present invention is particularly suitable for use on unwhitened terry fabrics in less desirable detergents that do not contain optical brighteners, compared to similar compositions containing conventional yellow dyes. Non-trivial whitening and/or bluing compared to whitening provides the above benefits.

Under these conditions, the whiteness improvement is only about 2 times greater with the compositions of the present invention compared to conventional yellow dye-confirming fabric softener compositions over 10 wash cycles.
(whiteness is ApJ using a Hunter colorimeter)
).

Fabric Softener The fabric softener that can be used in the present invention is disclosed in U.S. Patent No. 3.86.
Specification No. 1,870, Specification No. 4,308.151,
Specification No. 3,886,075, No. 4,233,164
Specification No. 4,401゜578 Specification No. 3,97
No. 4,076 and No. 4,237,016.

Preferred fabric softeners of the present invention consist of: Component 1(a) Preferred softeners (active ingredients) of the present invention consist of higher fatty acids and hydroxyalkyl alkylene diamines and dialkylene triamines and mixtures thereof. It is a reaction product with a polyamine selected from the group. These reaction products, in view of the multifunctional structure of polyamines, are mixtures of several compounds (see, for example, the publication by H. W. Eckert in the above-mentioned Fetch-Seifen-Assistrichmittel).

Preferred component 1 (a) is a nitrogen-containing compound selected from the group consisting of the reaction product mixture or some of the selected components of the mixture. More specifically, preferred component 1 (
a) is a compound selected from the following: (i) a reaction product of a higher fatty acid with a molecular ratio of about 2:1 and a hydroxyalkyl alkylene diamine [the reaction product has the formula: (III) wherein R is an acyclic aliphatic C15-C15-C22 hydrocarbon group, and R and R3 are divalent C1- C3 alkylene group) ; (II) a substituted imidacillin compound (Iv) having the formula: (wherein R and R2 are defined above) higher fatty acids with a molecular ratio of about 2=1 and a dialkylene triamine, the reaction product comprising a composition having a compound of the formula: where RR and R3 are defined as above: and (v)
Substituted imidacilline compounds having the formula: where R and R2 are defined above; and mixtures thereof.

Ingredient 1 (a)(i) is Mazamide (Mazai ide) sold by Mazail Chemicals.
6 or Ceranloco H sold by Sandoz Color End e-Chemicals
It is commercially available as C. Here, the higher fatty acid is a hydrogenated tallow fatty acid, the hydroxyalkylalkylene diamine is N-2-hydroxyethylethylenediamine, R1 is an aliphatic C-C hydrocarbon group, and R1 is an aliphatic C-C hydrocarbon group.
2 and R3 are divalent ethylene groups.

Component 1 (a) (It) - Examples include R1 being aliphatic C
It is hydroxyethylimidacillin sftearate in which the hydrocarbon group, R2, is a divalent ethylene group.

This chemical is manufactured by Alkaril Chemicals, Inc. under the trade name Alkazin (^Ikazlne).
■) ST or Scher Chemicals Inc. under the trade name Schercoz
ol Ine■)S is sold.

Component 1 (a) ([v) - Examples include R1 being aliphatic C
-C hydrocarbon group, R2 and R3 are N,N'-citaroalkyl diethylene triamines, which are divalent engineered tyrene groups.

An example of component 1 (a)(v) is 1-tallowamidoethyl-2-tallowimidapurine, in which R1 is an aliphatic C-C hydrocarbon group and R2 is a divalent ethylene group.

component! (a)(v) can also be first dispersed in a Brønsted acid dispersing aid that provides a pKa value of H or less, provided the pH of the final composition is about 4 or less. Some preferred dispersing aids are formic acid, phosphoric acid, or methylsulfonic acid.

Both N,N'-citallowalkyldiethylenetriamine and 1-tallowethylamide-2-tallowimidacilline are reaction products of tallow fatty acids and diethylenetriamine, and the cationic fabric softener methyl-1-
It is a precursor of tallowamide ethyl 2-tallowimidazolinium methyl sulfate. , January 1978, pp. 118-121)
. N,N'-citalloalkyldiethylenetriamine and 1-tallowamidoethyl-2-tallowimidazoline can be obtained as laboratory chemicals from Sierex Chemical Company. Methyl-1-tallowamidoethyl-2-tallowimidazolinium methylsulfate-1 is manufactured by Cierex-Chemical Company Niyotte, trade name: Parissoft (varISOrto) 47
It is sold at 5.

component! (b) Preferred component 1 (b) is 1 selected from the following:
is a cationic nitrogen-containing salt containing long chain acyclic aliphatic C1,~C2° hydrocarbon groups: (i) Formula: (wherein R4 is an acyclic aliphatic C15~C15~C22 carbonized (ii) a non-cyclic quaternary ammonium salt having the following formula: ~C4 is a saturated alkyl or hydroxyalkyl group, and Ae is an anion) A substituted imidazolinium salt; (tit) formula: (wherein R4 is an acyclic aliphatic 016-C22 hydrocarbon group and (v) a substituted imidazolinium salt having the formula (where RR and Ae are as defined above); and (1v) a substituted imidazolinium salt having the formula : (wherein, R is an acyclic aliphatic C15-C2, hydrocarbon group, R is a divalent C1-C3 alkylene group, and Ae is an anion) an alkanamide alkylene pyridinium salt having a; and their fair share.

Examples of component 1(b)(i) are monoalkyltrimethylammonium salts, such as those sold under the tradename Adogc by Chelex Chemical Company, respectively.
These are monochloro-trimethylammonium chloride, mono(hydrogenated tallow) trimethylammonium chloride, valmityltrimethylammonium chloride and glossytrimethylammonium chloride sold under the names 0) 471, Adgen 441, Adgen 444 and Adgen 415. In these salts, R4 is an acyclic aliphatic C16-C18 hydrocarbon group, and R5 and R
6 is a methyl group. Mono(hydrogenated tallow) trimethylammonium chloride and monotallow trimethylammonium chloride are preferred.

Another example of component 1(b)(i) is behenyltrimethylammonium chloride (trade name Kemas by Hamco Chemical Division of Liteco Chemical Corporation), where R4 is a C22 hydrocarbon group.
jneo) 02803-C);R
4 is a C16-CI8 hydrocarbon group, R5 is a methyl group, R6
is ethyl M; , methyl-bis(2-hydroxyethyl)ophtadekylammonium chloride in which R5 is a 2-hydroxyethyl group and R6 is a methyl group [available from Almack Company under the trade name ELhoquad 18/12]. .

component! (b) In the example (III), R1 is C17
hydrocarbon group, R is ethylene group, R5 is ethyl group, A is ethyl sulfate anion]-ethyl-1-(2
-hydroxyethyl)-2-isoheptadecylimidazolinium ethyl sulfate. It can be manufactured by Mona Industries, Inc. under the trade name Monaquat (No-Quat) ISIES.

Preferred compositions include Component 1(a) in an amount of about 50 to about 90% by weight of Component 1 and about 10 to about 50% by weight of Component I.
Component 1 (b) in an amount of .

Cation nitrogen gold platinum salt 1 (c) Two or more long-chain acyclic aliphatic C15-C15-C22 hydrocarbon groups, preferably one of the above groups and one arylalkyl group Cationic nitrogen-containing salts (these salts can be used alone or as part of a mixture)
is selected from the group consisting of the following; (1) formula; , R5 and R9 are C1-C4 saturated alkyl or hydroxyalkyl groups, and AO is an anion); (!ii) Formula: (wherein R4 is an acyclic is an aliphatic 015-C2° hydrocarbon group, R5 is a C1-C4 saturated alkyl or hydroxyalkyl group, R8 is selected from the group consisting of R4 and R5 groups, and AO is an anion as defined above. ) Acyclic quaternary ammonium salt (11) having the formula: Diaminoalkoxylated quaternary ammonium salt (iv) having the formula (R and Ae are as defined above): (wherein R4 is a non-cyclic a cycloaliphatic 015-C2° hydrocarbon group, R5 is a C1-C4 saturated alkyl or hydroxyalkyl group, Ae is an anion) (wherein, R1 is an acyclic aliphatic 015-C15-C22 hydrocarbon group, R2 is a divalent alkylene group having 1 to 3 carbon atoms, and R and Ae are as defined above). a substituted imidazolinium salt; and (wherein RR
and Ae is 1.sup.2 as defined above; and mixtures thereof.

Examples of component 1(c)(i) are the well-known dialkyldimethylammonium salts, such as sitalodimethylammonium chloride, sitalodimethylammonium methylsulfate, di(hydrogenated tallow)dimethylammonium chloride, distearyldimethylammonium chloride, Dibehenyldimethylammonium chloride.

Di(hydrogenated tallow)dimethylammonium chloride and sitallodimethylammonium chloride are preferred. Examples of commercially available dialkyldimethylammonium salts that can be used in the present invention include di(hydrogenated tallow)dimethylammonium chloride (trade name Adgen 442), sitaloo dimethylammonium chloride (trade name Adgen 470).
), distearyldimethylammonium chloride (trade name Arosurf TA-100) (all available from Cierex e-Chemical Company). Dibehenyldimethylammonium chloride in which R4 is an acyclic aliphatic C22 hydrocarbon group is manufactured by Hamco Chemical Co., Ltd. of Lightco Jutsu Chemical Corporation.
It is sold by Day Vision under the trade name Kemamin Q-2802C.

In an example of component 1 (c) (If), R1 is an acyclic aliphatic C-C hydrocarbon group, R2 is an ethylene group, R is a methyl group, R9 is a hydroxyalkyl group, and A is a methyl sulfate anion. Methylbis(tallowamidoethyl) (
2-Hydroxyethyl)ammonium methyl sulfate and methylbis(hydrogenated tallowamide ethyl) (
2-hydroxyethyl) ammonium methyl sulfate. These substances are
They can be manufactured manually by the company under the trade names Parisoft 222 and Parisoft 110, respectively.

An example of component 1 (c) (Iv) is dimethylstearylbenzylammonium chloride in which R4 is an acyclic aliphatic C hydrocarbon group, R5 is a methyl group, and A is a chloride anion; It is sold by Onyx Chemical Company under the trade name Parissoft SDC and by Onyx Chemical Company under the trade name AMMOEX (＾ff1lDOn)'X■)490.

An example of component 1(c)(v) is that R1 is an acyclic aliphatic C-
C hydrocarbon group, R2 is ethylene group, R5 is methyl group, A
1-Methyl-1-tallowamidoethyl-2-tallowimidalinium methylsulfate and 1-methyl-1-(hydrogenated tallowamidoethyl)-2(hydrogenated tallow)imidazolinium methylsulfate where is a chloride anion It is. They are each manufactured by Cielex Chemical Fist Company under the trade name Parissoft 475
and Parisoft 445.

Preferred compositions contain from about 10 to about 80% by weight of component 1 above.
Component 1(c) in an amount of . Also, more preferred compositions are selected from the group consisting of (i) di(hydrogenated tallow)dimethylammonium chloride and (V) methyl-1-tallowamidoethyl-2-tallowimidazolinium methylsulfate: and mixtures thereof. Contains component 1 (c). The preferred combination range for Component 1 (a) is from about 10% to about 80% of Component I and Component! In the case of (b), it is about 8 to about 40% by weight.

When component 1 (c) is present, component I is preferably present in an amount of about 4 to about 27 weight 96 of the total composition.

More specifically, component 1 (a) is a reaction product of about 2 moles of hydrogenated tallow fatty acid and about 1 mole of N-2-hydroxyethylethylenediamine, and about 10 to 10 moles of component I
and Component 1 (b) is mono(hydrogenated tallow) trimethylammonium chloride present in an amount of about 8 to about 20% by weight of Component 1; and Component! (c) is selected from the group consisting of di(hydrogenated tallow)dimethylammonium chloride, sitallodimethylammonium chloride and methyl-1-tallowamidoethyl-2-tallowimidazolinium methyl sulfate, and mixtures thereof; 1 (c) is present in an amount from about 20% to about 75% by weight of component I; Weight ratio is about 2:1 to about 6
The present composition in which =1 is more preferred.

The individual components mentioned above, especially those of I(c), can also be used individually.

Anion A In the cation nitrogen-containing salt of the present invention, the anion Ae
gives electrical neutrality. Most often, the anion used to provide electroneutrality in these salts is a halide, such as fluoride, chloride, bromide, or iodite.

However, other anions can be used, such as methyl sulfate, ethyl sulfate, hydroxide, acetate, formate, sulfate, carbonate, etc. Chloride and methyl sulfate are preferred as anion A in the present invention.

Liquid carriers Liquid carriers typically include water and water and short chains C1-C4.
- selected from the group consisting of alcohols and/or mixtures with polyhydric alcohols. The water used can be distilled, deionized, or tap water. Mixtures of water and short chain alcohols, such as ethanol, propatool, isopropanol or butanol, and up to about 15% mixtures thereof, are also useful as liquid carriers.

Optional ingredients Adjuvants can be added to the composition for known purposes.

Such adjuvants include, without limitation, viscosity control agents,
Included are fragrances, emulsifiers, preservatives, antioxidants, bactericides, fungicides, brighteners, opacifiers, freeze-thaw control agents, shrinkage control agents, and agents that provide ease of ironing. These adjuvants, if used, are added in conventional amounts, generally each up to about 5% by weight of the composition.

Viscosity control agents can be organic or inorganic in nature. Examples of organic viscosity modifiers are fatty acids and esters, fatty alcohols, and water-miscible solvents, such as short-chain alcohols. Examples of inorganic viscosity control agents are water-soluble ionic salts. A variety of ionic salts can be used. Examples of suitable salts are halides of metals of Groups 1A and 1IA of the Periodic Table, such as calcium chloride, magnesium chloride, sodium chloride, potassium bromide, and lithium chloride. Calcium chloride is preferred. Ionic salts are particularly useful during the process of mixing the ingredients to prepare the composition and subsequently to obtain the desired viscosity. The amount of ionic salt used depends on the amount of active ingredient used in the composition and can be adjusted according to the wishes of the formulator. Typical amounts of salt used to control the viscosity of the composition are from about 20 to about 6,000 ppm, preferably about 2 ppm by weight of the composition.
0 to about 4,000 ppm.

Examples of bactericidal agents for use in the compositions of the invention are gluguraldehyde, formaldehyde, 2-bromo-2 nitropropane-1,3 sold under the trade name Bronopolo by Ilux Chemicals.
-diol, and trade name CG/ by Rohm-End-Haas Company.
5-Chloro-2-methyl- sold under ICP
It is a mixture of 4-isothiazolin-3-one and 2-methyl-4-isothiazolin-3-one. Typical amounts of bactericide used in the compositions are from about 1 to about 1 by weight of the composition.
, OOOppm.

Examples of antioxidants that can be added to the compositions of the present invention are propyl gallate, which can be obtained from Eastman Chemical Products, Inc. under the trade names Tcnox PG and Tenox S-1, and U.
Product name Sustan (Su) from OP Process Division
stane o) Butylated hydroxytoluene available from BIT.

The composition may also contain silicone to provide additional benefits such as ironing comfort and improved fabric feel. A preferred silicone is polydimethylsiloxane having a viscosity of about 100 centistokes (CS) to about 100,000 cs, preferably about 2000 S to about 60,000 cs. These silicones can be used as such or conveniently added to the softener composition in pre-emulsified form which can be obtained directly from the supplier.

An example of these Y6m emulsifying silicones is a 60% emulsion of polydimethylsiloxane (3
50c s) and by the General Electric Company under the trade name General Electric (Gen
A 50% emulsion (10,000 cs) of polydimethylsiloxane sold in 8M2140 silicone.

The optional silicone component can be used in an amount of about 0.1% to about 6% by weight of the composition.

The soil release agent, usually a polymer, is about 0. It is a desirable additive in amounts of 1% to about 5%. Suitable soil release agents and mixtures thereof are described in U.S. Patent Section 4,702.857, 4.71.1. ．． Specification No. 730, No. 4,713
, No. 194. Other soil release polymers are disclosed in US Pat. No. 4,749,596.

Other minor components include short chain alcohols such as ethanol, isopropanol, ethylene glycol, propylene glycol, etc. that are present in commercially available quaternary ammonium compounds used in the preparation of the present compositions. The short chain alcohol is usually present in an amount of about 1 to about 10% by weight of the composition.

Preferred compositions include 0.2 to about 2% fragrance, 0 to about 3% polydimethylsiloxane, 0 to about 0.4% calcium chloride, about 1 ppm to about 1.0% by weight of the total composition.
00ppm bactericide, about 10ppm to about 1100ppm
of dye, and O to about 10% by weight of short chain alcohols.

The pH of the compositions of the invention is generally adjusted within the range of about 2 to about 6, preferably about 2 to about 5, more preferably about 2.5 to about 4. Adjustment of pH is usually accomplished by incorporating small amounts of free acid into the formulation. Since there are no strong pH buffers, only small amounts of acid are required. Any acidic material can be used. The selection can be made by those skilled in the art based on cost, manpower, safety, etc.

Acids that can be used include hydrochloric acid, sulfuric acid, phosphoric acid, citric acid, maleic acid, and succinic acid. However, the pH at dilution, e.g., at a typical dilution to a concentration of about 1 to 100 parts of water or less, is greater than or equal to about 7.5, preferably about 8 to enable the desired color change. It should be more than that. That is, the composition should not be strongly buffered.

The liquid fabric softening composition of the present invention can be prepared by conventional methods. A convenient and satisfactory method is to prepare a soft active ingredient premix at about 72-77°C and then add this premix to a hot water seat with stirring. The temperature-sensitive optional ingredients can be added after the fabric softening composition has been cooled to a low temperature.

The liquid (Ii fabric softening compositions of the present invention) are used by addition to the rinse cycle of a normal household laundry operation. Generally, the rinse water will have a temperature of about 10°C to about 60°C. The la degree of a fabric softener active ingredient is generally:
about 10 ppm to about 200 ppm by weight of the aqueous rinse bath;
Preferably it is about 25 ppm to about 1100 ppm.

In general, embodiments of the fabric softening method of the present invention include (1) washing the fabric in a conventional washing machine with a detergent composition;
rinsing the fabric with a lacquer containing the above amount of fabric softener;
(3) Consists of the step of drying the fabric. When multiple rinses are used, the fabric softening composition is preferably added to the final rinse. Fabric drying can be done either in an automatic dryer or in open air.

All percentages, proportions, and parts herein are based on mold pans, unless otherwise specified.

Varisoft O445 Imidacillin 2 Adgen 04413 Polydimethylsiloxane (55%) Silicone DC1520 (20%) Fragrance Baronic @ T220D Katon Tenox S-1 Hydrochloric acid (31,596) Calcium chloride 2596 solution D&C Yellow #7 (1% solution in water ) Nitrazine Yellow (1% solution in water) Water 3.40 0.57 J24 0.015 0.42 0.10 0.034 0.025 0.4-0.9 0ppm 0.17 Balance 3.40 0. 57 0.324 0.015 0.42 0.10 0.034 0.025 0.4-0.9 10pHXi Remainder 3.40 0.57 0.324 0.015 0.42 0.10 0.034 0 .025 0.4-0.9 10ppH 0.17 Remainder] Citallo alkyldimethylammonium chloride and monotallow base products are prepared by methods similar to those used in commercial products, and the colorant is simply added to the finished product. Add to. When using these products to treat unbrightened terry fabrics that have been washed with commercially available detergents such as A-L o which do not contain optical brighteners, they can be used to The change in Hunter Whiteness Index over 10 wash cycles at a given time is +9.7 for Comparative Example A and +15.4 for Example B.

Claims (1)

[Claims] 1. Fabric softener 3-35% by weight and colorant system 1 ppm
A fabric softening composition in the form of an acidic aqueous dispersion containing ~1,000 ppm, the colorant being nitrazine yellow;
bromothymol blue, and mixtures thereof, the composition as such having a pH of about 6 or less and having a pH of less than 1 in 100 parts of water after dilution with water.
A fabric softening composition having an H of about 7.5 or more. 2. The composition of claim 1, wherein the fabric softener is present in an amount of 4% to 27% and the colorant is present in an amount of 5 ppm to 200 ppm. 3. The fabric softener comprises, by weight, (a) 10% to 92% of the reaction product of a higher fatty acid and a polyamine selected from the group consisting of hydroxyalkyl alkylene diamines and dialkylene triamines and mixtures thereof; (b) Only one long chain acyclic aliphatic C_1_5-C_2
_2 Cationic nitrogen-containing salt containing hydrocarbon groups 8% to 9
0%; and (c) 2 or more long chain acyclic aliphatic C_1_5 to C_2
_2 Cationic nitrogen-containing salts having a hydrocarbon group or having one of the above groups and one arylalkyl group 0% to 8
0% and the remainder of the composition consists of a liquid carrier selected from the group consisting of water and mixtures of water and C_1 to C_4 alcohols, said composition having a pH of 2.0 to 5.0. 2. The composition according to 2. 4. The composition according to claim 1 or 2, wherein the coloring agent consists of bromothymol blue. 5. Claim 1, wherein the colorant consists of nitrazine yellow.
Or the composition according to 2. 6. The composition according to claim 1 or 2, wherein the coloring agent consists of a mixture of bromothymol blue and nitrazine yellow. 7. The composition according to any one of claims 1 to 6, wherein the pH of the as-is composition is between 2 and 5. 8. The composition according to claim 7, wherein the composition has a pH of 2.5 to 4. 9. Composition 1:1 in rinse water in rinse cycle
9. A composition according to any one of claims 1 to 8 is added in an amount giving a concentration of less than 0.00 parts, whereby the pH of the rinse water has a pH higher than 7.5 and the yellow colorant is A method of softening a fabric during the rinse cycle of a washing process characterized by a blue color change.